 Luckily I didn't mix enough rubber to completely fill mold because I didn't think the grip would float, which it did.  So I held it down with a lead ingot until the rubber set up enough that it wouldn't float, then mixed and filled the rest of the box.
		Luckily I didn't mix enough rubber to completely fill mold because I didn't think the grip would float, which it did.  So I held it down with a lead ingot until the rubber set up enough that it wouldn't float, then mixed and filled the rest of the box.